Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quem foi o oponente na Semana 7?
 ###Tabelas: CREATE TABLE average_crowd_sizes (average_crowd_sizes_id AUTO_INCREMENT PRIMARY KEY, Season VARCHAR, Ave. Attendance INT, +/- ave. on prev. season VARCHAR, Competition VARCHAR, Occupier VARCHAR) CREATE TABLE switchers_s_series (switchers_s_series_id AUTO_INCREMENT PRIMARY KEY, Model VARCHAR, Specification VARCHAR, Build date VARCHAR, Total produced INT, Wheel arrangement VARCHAR, Prime mover VARCHAR, Power output VARCHAR) CREATE TABLE schedule (schedule_id AUTO_INCREMENT PRIMARY KEY, Week INT, Date VARCHAR, Opponent VARCHAR, Result VARCHAR, Attendance VARCHAR) CREATE TABLE former_judges (former_judges_id AUTO_INCREMENT PRIMARY KEY, State VARCHAR, Born/Died VARCHAR, Active service VARCHAR, Chief Judge VARCHAR, Senior status VARCHAR, Appointed by VARCHAR, Reason for termination VARCHAR) CREATE TABLE 1939–1943 (1939–1943_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Born-Died VARCHAR, Term start VARCHAR, Term end VARCHAR, Political Party VARCHAR)  
SELECT Opponent FROM schedule WHERE Week = 7